Richard thomas brooke



(No Model.) .R-. T. BROOKE.

BOILER TUBE CLEANER.

No. 523,703. Patentd July 31, 1894.

Mzmm; ,3- \x ,3 fivm /rx UNITED STATES PATENT OFFICE.

RICHARD THOMAS BROOKE, or PARIS, OANADAD I BOlLER TUBE CL-EANER.

SPECIFICATION forming part Of Letters Patent No. 523,703, dated July 31, 1894. Application filed November 22, 1893- Serial No. 491,633. (No model.) Patented in Canada September 9, 1893, No. 44.221.

To all whom it may concern.-

Be it known that 1,; RICHARD, THOMAS BROOKE, a subject of the Queen of Great steel plate, that when each is secured to its to rod mechanism, said blades shall be cone,

inner side strap, and both straps connected or hell shape, that is, largerin diameter at its outer part than at its inner end, and shall be capable of adjustment to a larger diameter when requisite. The objects of my invention being, to provide a tube cleaner, that will scrape, and perfectly clean a tube, and at the same time possess a certain degree of elasticity in the manner of contraction and expansion, in orderto overcome any possible unevenness in the tube; and to afford facilities for the proper and complete adjustment of the same to a larger diameter, to .suit variations in tubes. This latter feature of enlargement provides for years of wear and tear. I attain these objects by the mechanism illustrated in the accompanying drawings, in which Figure 1, is a front elevation of the tube cleaner, the lower or shank end of which is in section. Fig. 2 is a section through the broken line m. a. Fig. 1.

Similar letters and. characters of reference refer to similar parts throughout the several views.

In the drawings the conical blades are indicated by A, the plan of which is circular, in two sections, each section, under and overlapping the other at their edges. This particular allows the blades to enlarge in diameter, and especially to contract, and at the same time the four edges are free from contact with each other. j

To easily comprehend the construction of the device, I will here indicate the edges of the left hand blade, or section by 2, and the right hand blade by 3. The edges of these blades are so shaped and notched out, that vwhen'in position they overlap each other, and are capable of being extended out in diameter, without losing their overlap. These blades are secured at 4, to the bent side straps B, the lower ends of which are secured to the square ended rod 0, by means of rivets 5. The lower part of this rod is round and threaded and forms a shank 0 extending as far as the broken line V. The flexible washer E, fits onto this shank against the shoulder 6 which is formed at the ends of said straps. This Washer E, is held in position, and slightly concaved 'by means of the concaved metallic washer F, and the combined nut and socket coupling H. The lower end of this socket is prepared to admit the screwed end of a long rod for manipulation purposes.

'In order to adj ust, or enlarge the bell shaped end of the cleaner, the nuts n, on threaded bolt .1, engage with the inner sides of straps B, thus forcing the same out, this adjustment being an important element in this cleaner.

The flexible washer E, before mentioned, is also very effective as a cleaner and assistant to the blades, both in the act of pushing and withdrawing the device through the tubes of a boiler.

What I claim as my invention, and desire to secure by Letters Patent, is

In aboiler tube cleaner the two steel blades A, bent in semi-circular form having edges overlapping each other out and shaped, and notched out as delineated by the lines 2 and 3, the bent side straps B, secured thereto'by rivets 4, and provided with the threaded bolt J, having inner nuts n, said side straps secured to square shank end 0, of threaded rod 0' by rivets 5, the flexible washer E, against shoulder 6, formed by said side straps and shank, the concave washer F, and coupling H, allformed, arranged and combined sub 

